*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
html{
    height: 90%;

}
body{
    height: 90%;

}
.app{
    height: 90%;
}
.body{
    display: flex;
    height: 90%;
    background-color: #7e7e7d;
    font-size: 20px;
}
#root{
    height: 90%;
}